Internal-combustion engine.



' s. HAw, JK'.

INTERNAL COMBUSTION ENGINE.

' APPICATIUN FILED IAR-15. 19N.

l Patented Nov. 14, i916.

2 SHEETS-SHEET l.

' @y v m/ im? 49W ggg@ B. THAW, Jn.

INTERNAL COMBUSTION ENGINE. APPLICATION mw JAN. I6, wis

mma 'Nw 14, 1916.

Ia'wewouj ezjamaw@ Thau@ ioaeio.

tuera stirare aan rai l BENJAMIN THnw, Ja., or Prrasnunen, PENNSYLVANIA.

NTERNL-COMBUSTION .ENG-INE. l

Applicationled January 16, 1914. Serial No. SliA?.

To all whom t may concern.'

Be it known that I, BENJAMIN THAw,r

Jr., a-citizen of the vUnited States, and a resident of Pittsburgh, in the county of Alleghenyand State of Pennsylvania, have invented an Improvement in Internal-Combustion Engines,.of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings l representing like parts.

rlhis invention relates to internal combustion engines and has particular reference to the valve actuating means thereof.

In=order that the principle of tlie invenf tion may be. readily understood, I have dis# closed a single embodiment thereof in the accompanying drawings, v'vherein-` Figure 1 is a vertical, transverse section taken through the cylinder and piston of a reoiprocatory, internal combustion engineembodyingmy invention; Fig. 2, a transverse section taken through the intake and i, exhaustports of the cylinder; Fig. 3, a horizontal section taken through a four cylinder internal combustion engine embodying my invention; Figf 4, a development of the sleeve valve preferably employed by me in the practice ofA my invention; and Figs. b and 6 are diagrammatic illustra-tions of 'the form of intake and exhaust ports at regu# lar and variable-speeds respectively of the l sleeve valve.

- Referring more particularly to the drawings, the cylinder is representedat 1, it being preferably cast in a single piece and having a waterjacket 2. `It desired it may be cored as indicated at 3, to secure lightness of construction. The said cylinder is provided with anyv suitable ,ignitionuneana such as a spark plug 4.

Within the cylinder is positioned the pis,l ton e having therein a wrist pin G to which` is connected a piston rod 7', the oppositel end of which is pivotally connected in any suitable manner to a crank arm 8, whereby rotative movement imparted to the crank arm 8 reciprocates the piston in the cyl-4 inder.

The cylinder is provided with an intake port 9 whichfis desir-ably two-thirds the length of the piston stroke, and with an exhaust port 10 which is of the full length.

Ilesirably, also, the width ci' said stroke.

Specification of Letters Patent.

Patented Nev.. Sie, 19h33 of the intake port and also the exhaust port 1s sixty degrees, or one-sixth of the circumference of the cylinder.

In accordance with my invention I pro-` vide a sleeve valve which is mounted for relative t'urnin movement with respect to the cylinder. lreterably turning movement is imparted to the sleeve valve, and 'preti erably also said sleeve valve is mounted exteriorly of the body of the cylinder. To

that end, I have herein represented a cylindrical sleeve 11, which aty its lo'wer'end is supported upon an annular flange 12 ofthe cylinder l, ball bearingsll being interposed therebetween if desired. Exteriorly of said sleeve I position a cylinder sleeve 14 which at its upper en'd contacts with the cylinder 1 and is herein represented as secured thereto by bolts 15. Preferably'the said sleeve 11i is made in a single part and is slipped onto the cylinder 1 'over the upper end thereof. I have herein represented the said sleeve 14 as having a shoulder portion 20, within which is positioned a cam roller 21 upon the end of the Wrist pin 6. -The construction and arrangement of partsA is .such that upon' imparting 'reciproeating'v movement to the piston 5, the cam roller 21, traveling in the cam track 20, imparts rota tive movement Ato the sleeve valve 111 Viewing Fig. 2, it will be observed that the width of the sleeve valve opening 18 is ksuch that the exhaust port is wholly closed before the intake.v port is opened. IPreerp ably the cylinder is so constructedV andA an ranged that the intake and exhaust orte are spaced apart thirty 4degrees in one ire tion and 210 degrees in the opposite direction, the. width of the sleeve valve port 18 being also preferably equal tofthirty degrees of the periphery o't the cyl'nder, and the les length thereof being preferably equal to the;

-full pistonstroke.

.In Fig. 3 I havelrepresented a tour cyluefa,

s so eensrueeed met deeu are mpefted. te the Sleeve Y were, have represented the #Jing 'eur portions; which indicate( as; 2&2, 23, respective@ ntene et ee said sleeve fe'lve n ae-oke, the eempfesson op ggneon Stroke, and the if? epenng; a3 in be sleeve veve e0- nedes W'sl ehe thirty degree eod Well be meen me exeuss'. en@ mieke valve pol-ts ef the cj'me. As the piston 5 moves downward. to commence ehe nucben stroke, the eeeve ele is eewy wreed es to secure e slew niel opening of elle intake polt of the eynee-, and; then during the continua,- bien of he downward ereke f the pieton a quick cempiee opening of seid intake geert is By hus opening the rleke die by e, slow inel action seemfe :sub-

Y etemize' action en@ obeee flzeen wmut :my x'nendency te.

35 werd. e emu 'me gese'lene er other metwe ux. 'The pel-* me prefembiy se cm1- soruee gha: when he pxston has; movedl 'hiy degree solid cylinder well sepemng the intake and exheus pores, thus eeseg he valve poet.

The cem tracks 2e and 25 se Shaped as to eee t ie epereen heeie' fmtx. The inelneon of? @he cam geneve 2li for che explosion stroke y' is sheep ee me commencement thereof, in orcer to take er 'eheve he shock of the parts melemt to the movement of the sleeve valve. it will be noted the# the curve of the @am track: 25 substentiay Het et s commencemenfb, se that lle exhaust port will be quickly opened,

An important feature of the nventlen resides in the le-ge port areas. AS heesefore pointed out, the im'zake portfhes a length subssentiey eq'ueing two-thirds the pisson stroke, and the exhaust port has e length substantially equelng the full Piston stroke. The port in the sleeve Valve 1s prefereby subsentiely thirty' degrees' in Width, and if; is preferably of the .fail length o the pieton sleke.

nesmr-zch as he ewel .right-heno?. cerne? poron of the sleeve velve port 18 (viefw Fig. 1 1) would be unused were seid pom; rece-angular, preferably' form seid pe with n tapering ower end, es there shown. I am thus enabed 'Le bring he evaleble of said por?, imse close meximty ie the eem track.' 9), and thereby She'en fhekeigd ef ghe Sleeve veve il.

have herefeefol'e zefered to @he intake em exiheus; pee-s :1s of pfefezeby e, Wi Sh equeug sixgy degrees ef 'he perphegff ehe eyinder. The eenstruetion and operiec-en eff ehe Gams we such that, e 'pefgon eff web ef these peres is noi uncovered by the por@ 213 of the see've veve ngo the Toafye movement of nncevee gjm'- tens of said neke en@ exhaust po's (e,ssue-ning ithefa the seeve veve ie im'e'ed e; e efmsent speed) have imeeef at 25 and. Q7 in Fig. 5, @le uneovexed poren of equelng substeniely one eighth :md time of ehe esge equeingr sebsv'v'eeey eee 'lrfs ef :the eetife aree o?? seid pori; esmaueh, however, ee e eeeve miv-e bei n ehewe is mime@ ei; diereue epeeae, ibe Hausen? pmon of gse-rte 9, l() nearly approximates at 26, 27 e, wherein, however, have e015 attempted accurately to p'lo the precise em'vec Inasgnuch ies the described nweons of said porfas are not used, preiefe the eonsrnction shown 'f Jij l:aannam )the same With solid portions of the cylinder,

thus strengthening the latter and decreasing tliepocket areas of the ports to that extent.

Preferably the cylinders shown in Fig. 3 are so Constructed and arranged that the sleeve valves ofthe r'st and third turn in one direction and the sleeve valves vof the second Jand fourth turn in the opposite direction. ,T his may be eilected by connecting not being limited to the employment of the.

Wrist pin for this purpose;

rlhe internal combustion engine herein disclosed is of simple construction, necessitating the use of. but a single valve, and the latter is preferably operated directly by the Wrist pin of the piston.

Having thus described one illustrative. embodiment of my invention, I. desire it to, i be understood that although specific terms are employed, they are used in a generic and descriptive sense and not for purposes of limitation, the scope ofI the invention being set forth in the following claims. i

fLclaim.: 1. An internal 'combustion engine comprising, in combination, a cylinder having intake and enhaust ports, a piston reciprocable in said p`cylinder, a sleeve valve mounted to turn with respect to said cylinder and having a port therein provided With a'tapered lower end, and co-acting means upon said valve and piston to turn the former.

2. An internal combustion engine comprising, iii combination, a cylinder having intake' and exhaust ports, a piston reciprocable in said cylinder and provided With a Wrist pin and a piston rod connected thereto, a sleeve valve mountedconcentrically With respect to said cylinder and having a port therein and a cani track, said vWrist pin having an extension positioned in said cam track.

3. An internal combustion engine comprising, in combination, a cylinder having a single intake and a singleexhaust port of substantially equal Width, a piston reciprocable in said cylinder, a sleeve valve mounted v concentrically and arranged to turn With respect tosaid cylinder andhaving a portV therein of a Width substantially one-half either the intake or the exhaust port, and means torotate said sleeve valve.

4. An internal combustion engine comprising, in combination, a cylinder, al piston reciprocable therein, said cylinder having an intake port of a length substantially equaling two-thirds the piston stroke and an exhaust port substantially equaling the full piston strokef: sleeve valve mounted conccntrically and adapted to turn With respect to said cylinder and having a port therein of substantially the length of the g full piston stroke, and .neans t0 rotate said sleeve valve.

5. An internal combustion engine coinprising, in combination, a cylinder, a piston p reciprocable therein, said cylinder having intake and exhaust'ports of substantially equal Width, the inta'ke port being of a length substantially equalin'g two-thirds the piston stroke andA the exhaust port being of a length substantially -equaling the full piston stroke, a sleeve valve mounted concentrically and adapted to turn with respect to said cylinder and having a port therein of a Width substantially one-half the'Width of the intake or the exhaust ports and -of'a length substantially equaling the full piston stroke, and means to rotate said sleeve valve.

6. An internal combustion engine com-v prising, in combination, a cylinder, a piston reciprocable therein, said .cylinder having intake and exhaust ports, the exhaust port being of 'a length substantially equaling the full piston stroke, asleeve valve mounted concentrically and adapted to turn With respect to said cylinder and having a port therein of substantially thev length of the full piston stroke, and means to rotate said sleeve valve. l

7. An internal combustion engine comprising in combination, adeylinder4 having intake and exhaust ports,1a piston recpro cable in said cylinder, a. sleeve Valve mounted to turn With respect to said cylinder and having a port therein, and means to rotate said sleeve valve, said intake and exhaust ports each having one lateral Wall thereof inclined at its lower end.

8. An internal combustion engine comprisinggn combination, a cylinder having a recess and intake and exhaust ports, apiston reciprocable in said cylinder, a straight sleeve valve mounted in said cylinder recess, and having a port and afcain track therein, ball bearings at the ends of said sleevefto reduce the frictdon thereof, and means projecting from said piston into said track for imparting rotative movementto said sleeve With respect to said cylinder.

9. An internal combustion engine comprising, in combination, a cylinder having a recess and intake and exhaust ports, a piston reciproeable in said cylinder, a straight' quai Width.: h exhuis port being ai' a. .length substantially equalng the iul piston sroke, seeve Vave mmmd concentricay Pm adap'ved i@ tum with respect ..0 said ylinde and having a port therein of a wid-*Uh substantially one-half the Width of tha asake of h@ exhaust ports an of a ength substantially equang th@ ul Stroke, and means "to rotaie said sleeve valve.

Witnesses A RVING U, TQWNSEND, Mcm ki. 015mg. 

